[Solved] Arraylist for subclasses [duplicate]
I’m guessing it’s the line Program.setInventorie(c1);. You need to create an instance of the Program class and call setInventorie() on that. setInventorie() is not a static method. e.g.: Program myProgram = new Program(); myProgram.setInventorie(c1); 7 solved Arraylist for subclasses [duplicate]